Open source free STM32 information,
stm32f103c8t6 drives 0.96-inch OLED (ssd1306), 1.8-inch LCD (st7735), NFC (rc522), ADC sampling, distance sensor (VL53L0X), air pressure and temperature sensor (bmp280), the program and PCB tool board are all open source,
esp8266 check-in client and server: gitee
Demo video bilibili
esp32 bluetooth mouse: gitee
Demo video: bilibili
Windows serial port: gitee
Open source Bluetooth development board PCB: Lichuang open source
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I will also share more knowledge I learned in the future